KENSINGTON Trackball Pro Fit Ergo TB550 80004518 K72196WW Product Description: Kensington Pro Fit Ergo TB550 Trackball - vertical mouse - Bluetooth, 2.4 GHz - black, blue-grey Device Type: Vertical mouse - ergonomic Connectivity Technology: Wireless - Bluetooth, 2.4 GHz Colour: Black, blue-grey Dimensions (WxDxH): 9.344 cm x 13.816 cm x 5.01 cm Weight: 142.6 g Wireless Receiver: Nano USB wireless receiver Movement Detection Technology: Optical Buttons Qty: 9 Movement Resolution: 1600 dpi Performance: Realtime sensitivity switching 400/800/1200/1600 dpi Features: 7 programmable buttons, vertical and horizontal scrolling, rechargeable battery, LED indicator, 4D scrolling wheel, built-in trackball ejection button OS Required: Windows 10 or later, Apple macOS 10.14 or later, Google Chrome OS 91 or later, Apple iPadOS 16.4.1 or later Package Type: Retail - colour box Product Recycled Content: 70 % - made of post-consumer recycled content Manufacturer Warranty: 3-year warranty